i will soon be doing the 247 to 242 swap in a 99 grand cherokee v8, 45rfe tranny, my question is what is the difference between the 4.0 grands with the 242 and the v8 grands with the 242? If i get a 242 from a 4.0 grand can i make it work in my v8 with parts from the 247? Let me know thanks guys
- also what is the and jeep models and year with the 242 that i can use in my setup?

It seems that Brown thinks that there is probably a difference between the 4.0 and 4.7 versions with the 4.7 being heavier duty.

I checked my 01 parts catalog to see what I could find. It turns out that there are different part numbers for the two versions of the complete TC assemblies. In addition, many of the internal parts have different numbers for the 4.0 and 4.7 versions. I have no personal experience with this, but I would go with the 4.7 version in my 4.7 and not take a chance on the 4.0 version.

Some notable exceptions: since my particular 242j transfer has a bigger output shaft with more splines, I had to use the donor WJ’s rear drive shaft also. My new NV242 is 2” longer than the old NV 247.

I just did this last weekend...aside from being a pain, it was worth it. You will need the the shifter assembly..its a cool 225 from the stealership. All the link cables are the same. the 242j has a 32 spline tail yoke, the 247 is 27. Your best bet to keep your sanity in this process is to unbolt the crossmember after you have a trans jack in place under the trans. and then un bolt the motor mount so the cross memeber will fall. Now here is the *****, the other side of that motor mount, that bolts up to the bottom of the trans, you have to remove it to get on the bottom two bolts. That mount is held by 15mm bolts, i sugest to you a 6 point socket in 1/2 drive or bigger with a breaker bar, and a mild extender... to keep from busting your knuckles
ahh other than that i had a few bolts left over from the shifter assembly switch over, and the center console has some hidden bolts in some wierd locations.

oh yea... DONT TOUCH THE LITTLE SILVER BOX towards the back...thats the AIRBAG module! bad stuff happens
good luck and if you take pictures along the way, I'll do the write up, I just forgot to take pictures while i was doing it